<html>
<title>1</title>
<head>
<meta charset="UTF-8">
<style></style>
</head>

<body>
<div>
 <tr><td>
 <select id="s1Id">
<option></option>
<option value="o1" id="id1">o1</option>
<option value="o2" id="id2">o2</option>
<option value="o3" id="id3">o3</option>
</select>
 </td></tr>

</div>
<div></div>
<div><input type="button" id="submit" value="submit" name="submit" onclick = "alert('1')"/> 点击</div>

 <div>
        <input id = "alert" value = "alert" type = "button" onclick = "alert('欢迎！请按确认继续！');"/>  
        <input id = "confirm" value = "confirm" type = "button" onclick = "confirm('确定吗？');"/>  
        <input id = "prompt" value = "prompt" type = "button" onclick = "var name = prompt('请输入你的名字:','请输入  你的名字'); document.write(name) "/>
 
  </div>
  
  <div>
  <p>Are you sure you want to do this?</p>
  <a href="continue.html">Continue</a>
  <a href="cancel.html">Cancel</a>
  </div>
  
  <div> <p class="content">Site content goes here.</p></div>
</body>

</html>
